From quantum to classical description of intense laser-atom physics with Bohmian trajectories

Details From quantum to classical description of intense laser-atom physics with Bohmian trajectories From quantum to classical description of intense laser-atom physics with Bohmian trajectories

2009-12-20

arxiv.org/abs/0912.3979v1

New J.Phys.11:113035,2009

Physics

Atomic Physics

13 pages, 5 figures

Scientific paper

In this paper, Bohmian mechanics is introduced to the intense laser-atom physics. The motion of atomic electron in intense laser field is obtained from the Bohm-Newton equation. We find the quantum potential that dominates the quantum effect of a physical system becomes negligible as the electron is driven far away from the parent ion by the intense laser field, i.e. the behavior of the electron smoothly trends to be classical soon after the electron was ionized. Our numerical calculations present a direct positive evidence for the semiclassical trajectory methods in the intense laser-atom physics where the motion of the ionized electron is treated by the classical mechanics, while quantum mechanics is needed before the ionization.

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